The net weights (in grams) of sample of bottles filled by machine manufactured by Edne, and net weights of sample filled by similar machine manufactured by Orno, Inc., are:
Edne: 5, 8, 7, 6, 9 and 7
Orno: 8, 10, 7, 11, 9, 12, 14 and 9
Testing the claim at 0.05 level that mean weight of the bottles filled by Orno machine is greater than the mean weight of bottles filled by the Edne machine, Determine the critical value? Suppose equal standard deviations for both samples.